CA CA CA
CA
CB CB
CB
CB
TBCNT
EPWMxA
EPWMxB
TBPRD
(value)
Enhanced PWM (ePWM) Module
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Table 15-29 and Table 15-30 contains initialization and runtime register configurations for the waveforms
in Figure 15-31. Use the code in Example 15-1 to define the headers.
Figure 15-31. Up-Down-Count, Dual Edge Symmetric Waveform, With Independent Modulation on
EPWMxA and EPWMxB — Complementary
(1) PWM period = 2 × TBPRD × T
TBCLK
(2) Duty modulation for EPWMxA is set by CMPA, and is active low, i.e., low time duty proportional to CMPA
(3) Duty modulation for EPWMxB is set by CMPB and is active high, i.e., high time duty proportional to CMPB
(4) Outputs EPWMx can drive upper/lower (complementary) power switches
(5) Dead-band = CMPB - CMPA (fully programmable edge placement by software). Note the dead-band module
is also available if the more classical edge delay method is required.
1530
Pulse-Width Modulation Subsystem (PWMSS) SPRUH73H–October 2011–Revised April 2013
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